JPH06761Y2 - Heat-resistant tubular member testing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a heat-resistant tubular member, and more particularly to a device suitable for testing heat resistance, heat insulation and the like of exhaust system equipment used in an internal combustion engine of an automobile.

[Conventional technology]

Conventionally, when developing a new engine, exhaust system equipment associated with the engine is also evaluated. For example, a manifold evaluation test is carried out by mounting the engine on the engine after the engine is completed. Therefore, the evaluation test of the manifold cannot be performed until after the engine is completed, resulting in an unfavorable result that the development period of the engine is significantly extended.

Therefore, the present applicant previously proposed a utility model registration application with 63.1.20 (heat-resistant tubular member testing device), but problems still remain.

[Problems to be solved by the invention]

That is, as shown in FIG. 2, the combustion chamber wall 2 of the combustion chamber 1 is formed of a heat-resistant metal tube 11, and a ceramic tube 12 having a high degree of fire resistance is inserted into the inner surface of the heat-resistant metal tube 11 so that the test apparatus 4 can be installed. Has been formed.

However, in such a structure, since the thermal conductivity of the ceramic tube 12 of the combustion chamber 1 is large, the heat applied to the inner surface directly reaches the heat-resistant metal tube 11 through the ceramic tube 12, and the heat-resistant metal tube 11 is thermally deformed. There was a problem that the ceramic tube 12 was damaged.

An object of the present invention is to solve the above-mentioned drawbacks and to provide an apparatus for testing a heat-resistant tubular member capable of improving the durability of the combustion chamber 1.

[Means for solving problems]

The heat-resistant tubular member testing device of the present invention comprises a combustion chamber 1 connected to a pipe portion of a heat-resistant tubular member 6 having at least one pipe portion, and a combustion chamber 1 connected to an air passage 8 and a fuel supply passage 9. A test apparatus for a heat-resistant tubular member having an inserted burner 5 and an exhaust pressure-increasing air passage 7 opening to a chamber wall 10 of a burner portion of a combustion chamber 1, wherein the heat-resistant metal of the combustion chamber wall 2 of the combustion chamber 1 is used. It is characterized in that it is formed of a tube 11, a heat insulating and heat insulating material 15 is inserted into the inner surface of the heat resistant metal tube 11, and a ceramic tube 12 having a high degree of fire resistance is inserted into the inner surface of the heat insulating and heat insulating material 15. Reference numeral 13 is an intermediate member, and 14 is a temperature sensor. Moreover, 3 is a flame.

〔Example〕

Hereinafter, the device of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a sectional view of an apparatus for testing a heat-resistant tubular member according to the present invention.

A temperature sensor 14 was attached to the outer surface of the heat-resistant metal tube 11 to perform heating and cooling tests.

FIG. 3 compares the temperature rise state of the outer surface of the heat-resistant metal tube 11 for one cycle between the conventional test apparatus and the test apparatus of the present invention, whereas it is about 900 ° C. in the conventional heating test apparatus. With the heating test device of the present invention, it is 450 ° C and 1/2. This is because the outer surface of the ceramic tube 12 is a heat insulating material 15.
Since the heat applied to the inner surface of the ceramic tube 12 does not reach the heat-resistant metal tube 11 directly because it is covered with, the durability of the heat-resistant metal tube 11 is greatly improved and the performance of the test apparatus is improved. That is what I got.

[Effect of device]

As is clear from the above explanation, the heat-resistant tubular member testing device of the present invention can reduce the heat load applied to the combustion chamber, so that the durability of the combustion chamber is greatly improved and a long-term durability test is possible. It has an excellent effect such as

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a test device according to the present invention, FIG. 2 is a cross-sectional view of a conventional test device, and FIG. 1: Combustion chamber 2: Combustion chamber wall 5: Burner 6: Heat-resistant tubular member 7: Exhaust pressure boosting air passage 8: Air passage 9: Fuel supply passage 10: Chamber wall 11: Heat-resistant metal pipe 12: Ceramic pipe 15: Adiabatic heat insulation Material

Claims (1)

[Scope of utility model registration request] 1. A combustion chamber connected to a pipe portion of a heat-resistant tubular member having at least one pipe portion, a burner connected to an air passage and a fuel supply passage and inserted into the combustion chamber, and a burner portion of the combustion chamber. In a heat-resistant tubular member testing device having an exhaust pressure-increasing air passage opening to a chamber wall, the combustion chamber wall of the combustion chamber is formed of a heat-resistant metal tube, and an insulating heat insulating material is inserted into the inner surface of the heat-resistant metal tube, A heat-resistant tubular member testing device, characterized in that a ceramic tube having a high degree of fire resistance is inserted into an inner surface of a heat insulating and heat insulating material.